Portion of a bank of computer chassis mounted to rack bars



FIG. 1 is a perspective view of my design;

FIG. 2 is a front view of my design;

FIG. 3 is a rear view of my design;

FIG. 4 is a left side view of my design;

FIG. 5 is a right side view of my design;

FIG. 6 is a bottom view of my design; and,

FIG. 7 is a top view of my design.

The broken lines are shown in the views for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portion of bank of computer chassis mounted to rack bars, shown and described. 